PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-00:27:40
G10     250.8          26.9               14.1 +/-    1.65      26.4 +/-    1.65  0.160 / 0.620
G13     53.3           29.7               10.6 +/-    0.85      18.6 +/-    0.85  0.140 / 0.670
G15     90.0           58.7               13.7 +/-    0.95      15.7 +/-    0.95  0.030 / 0.050
G16     294.1          15.9                8.2 +/-    1.69      19.9 +/-    1.69  0.040 / 0.050
G20     260.2          35.1               10.4 +/-    0.64      16.4 +/-    0.64  0.090 / 0.130
G21     332.7          59.7               11.7 +/-    0.85      13.4 +/-    0.85  0.100 / 0.120
G26     266.1          15.6               13.5 +/-    3.12      33.0 +/-    3.12  0.050 / 0.060
G29     165.3          50.8               13.2 +/-    0.94      16.5 +/-    0.94  0.040 / 0.070